CN209419941U - A kind of low-power consumption fast start circuit of LED drive power - Google Patents
A kind of low-power consumption fast start circuit of LED drive power Download PDFInfo
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- CN209419941U CN209419941U CN201821799186.1U CN201821799186U CN209419941U CN 209419941 U CN209419941 U CN 209419941U CN 201821799186 U CN201821799186 U CN 201821799186U CN 209419941 U CN209419941 U CN 209419941U
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- 238000004804 winding Methods 0.000 claims abstract description 28
- 239000003990 capacitor Substances 0.000 claims description 62
- 239000004065 semiconductor Substances 0.000 claims description 48
- 238000001914 filtration Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 5
- 238000005286 illumination Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B44/00—Circuit arrangements for operating electroluminescent light sources
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model relates to a kind of low-power consumption fast start circuits of LED drive power.In the start-up circuit, the input terminal of input rectification circuit connects AC power source, and the output end of input rectification circuit connects fast start circuit by filter circuit, and the output end of fast start circuit connects pwm chip；The output end of auxiliary winding power supply circuit connects fast start circuit, and the output end of auxiliary winding power supply circuit connects pwm chip.The utility model increases a fast start circuit in the control chip periphery of not high voltage startup, power supply of the busbar voltage after the power input rectifies to pwm chip is disconnected after making LED drive power quick start, busbar voltage is significantly reduced to the loss in pwm chip power supply line, power-efficient is improved, to improve power supply reliability and extend the service life of LED drive power.
Description
Technical field
The utility model relates to LED power field, the low-power consumption more specifically to a kind of LED drive power is quick
Start-up circuit.
Background technique
As the improvement of people's living standards, requirement of the people to quality of the life is also higher and higher, for LED illumination,
It is desirable to have the LED illumination lamp that i.e. energy conservation can be opened quickly again to appear in life.But LED illumination is in the market at present,
It is still connected to after input rectifying by the biggish resistance of several resistance values there are also the opening ways of many driving powers and is controlled with PWM
Between the VCC power supply foot of chip, the chip for directly carrying out high voltage supply to pwm chip is not much, this results in current city
It is slightly long there are also the opening time of many LED illumination lamps on field, it is not able to satisfy the expectation of people more and more, and now
Some technical standards have also been distinctly claimed stand-by power consumption and have opened the machine time less than 0.75S less than 0.5W, therefore there is an urgent need to a kind of new
Open machine mode to meet above-mentioned requirements.
Utility model content
The technical problem to be solved by the present invention is in view of the above drawbacks of the prior art, provide a kind of LED driving
The low-power consumption fast start circuit of power supply.
The technical scheme adopted by the utility model to solve the technical problem is as follows: constructing a kind of low function of LED drive power
Consume fast start circuit, including input rectification circuit, filter circuit, fast start circuit, auxiliary winding power supply circuit, PWM control
Coremaking piece, wherein
The input terminal of the input rectification circuit connects AC power source, and the output end of the input rectification circuit passes through described
Filter circuit connects the fast start circuit, and the output end of the fast start circuit connects the pwm chip；
The output end of the auxiliary winding power supply circuit connects the fast start circuit, the auxiliary winding power supply circuit
Output end connect the pwm chip.
Further, the low-power consumption fast start circuit of LED drive power described in the utility model, the input rectifying
Circuit is diode group rectification circuit.
Further, the low-power consumption fast start circuit of LED drive power described in the utility model, the filter circuit
For capacitor C1, one end of the capacitor C1 connects the output end of the input rectification circuit, the other end ground connection of the capacitor C1.
Further, the low-power consumption fast start circuit of LED drive power described in the utility model, the quick start
Circuit includes reference voltage-stabilizing circuit, metal-oxide-semiconductor Q1, triode Q2, bleeder circuit and capacitor CE1, wherein
The input terminal of the reference voltage-stabilizing circuit connects the capacitor C1 and the input rectification circuit tie point, the base
The output end of quasi- voltage regulator circuit is separately connected the grid of the metal-oxide-semiconductor Q1 and the collector of the triode Q2, and the benchmark is steady
The ground terminal of volt circuit is grounded；
The drain electrode of the metal-oxide-semiconductor Q1 connects the capacitor C1 and the input rectification circuit tie point, the metal-oxide-semiconductor Q1's
Source electrode connects one end of the capacitor CE1, the other end ground connection of the capacitor CE1；
The base stage of the triode Q2 connects the tie point of the capacitor CE1 Yu the metal-oxide-semiconductor Q1 by bleeder circuit；
The pwm chip connects the tie point of the capacitor CE1 Yu the metal-oxide-semiconductor Q1.
Further, the low-power consumption fast start circuit of LED drive power described in the utility model, the benchmark pressure stabilizing
Circuit includes resistance R1, resistance R2, resistance R3, resistance R4 and three-terminal voltage-stabilizing pipe U3；
The input terminal of the three-terminal voltage-stabilizing pipe U3 passes through the resistance R1 and resistance R2 connection capacitor C1 and the institute of connecting
State input rectification circuit tie point；
The output end of the three-terminal voltage-stabilizing pipe U3 is separately connected the grid of the metal-oxide-semiconductor Q1 and described by the resistance R3
The collector of triode Q2；The output end of the three-terminal voltage-stabilizing pipe U3 connects the transmitting of the triode Q2 by the resistance R4
Pole；
The ground terminal of the three-terminal voltage-stabilizing pipe U3 is grounded.
Further, the low-power consumption fast start circuit of LED drive power described in the utility model, the bleeder circuit
Including resistance R7 and resistance R8；
The base stage of the triode Q2 connects the tie point of the capacitor CE1 Yu the metal-oxide-semiconductor Q1 by the resistance R7,
The base stage of the triode Q2 connects the emitter of the triode Q2 by the resistance R8.
Further, the low-power consumption fast start circuit of LED drive power described in the utility model, the quick start
Circuit further includes resistance R5 and diode D1；
The drain electrode of the metal-oxide-semiconductor Q1 is connect by the resistance R5 connection capacitor C1 with the input rectification circuit
Point；The source electrode of the metal-oxide-semiconductor Q1 connects the anode of the diode D1, and the cathode of the diode D1 connects the capacitor CE1.
Further, the low-power consumption fast start circuit of LED drive power described in the utility model, the quick start
Circuit further includes resistance R6, and the grid of the metal-oxide-semiconductor Q1 connects the source electrode of the metal-oxide-semiconductor Q1 by the resistance R6.
Further, the low-power consumption fast start circuit of LED drive power described in the utility model, the auxiliary winding
Power supply circuit includes transformer auxiliary winding, resistance R9 and diode D2；
The transformer auxiliary winding connects the anode of the diode D2, the cathode of the diode D2 by resistance R9
Connect the tie point of the capacitor CE1 Yu the metal-oxide-semiconductor Q1；
The cathode of the diode D2 connects the pwm chip.
Further, the low-power consumption fast start circuit of LED drive power described in the utility model, the capacitor CE1
For electrolytic capacitor, the anode of the electrolytic capacitor connects the source electrode of the metal-oxide-semiconductor Q1, the cathode ground connection of the electrolytic capacitor.
The low-power consumption fast start circuit for implementing a kind of LED drive power of the utility model, has the advantages that
The start-up circuit includes input rectification circuit, filter circuit, fast start circuit, auxiliary winding power supply circuit, PWM control core
Piece, wherein the input terminal of input rectification circuit connects AC power source, and the output end of input rectification circuit is connected by filter circuit
The output end of fast start circuit, fast start circuit connects pwm chip；The output end of auxiliary winding power supply circuit connects
The output end of fast start circuit, auxiliary winding power supply circuit connects pwm chip.The utility model is in no high voltage startup
Control chip periphery increase a fast start circuit, make to disconnect power input rectification after LED drive power quick start
Power supply of the busbar voltage afterwards to pwm chip significantly reduces busbar voltage to the damage in pwm chip power supply line
Consumption improves power-efficient, to improve power supply reliability and extend the service life of LED drive power.
Detailed description of the invention
Below in conjunction with accompanying drawings and embodiments, the utility model is further described, in attached drawing:
Fig. 1 is a kind of structural schematic diagram of the low-power consumption fast start circuit of LED drive power of the utility model；
Fig. 2 is a kind of circuit diagram of the low-power consumption fast start circuit of LED drive power of the utility model.
Specific embodiment
For a clearer understanding of the technical features, objectives and effects of the utility model, now control attached drawing is detailed
Illustrate specific embodiment of the present utility model.
With reference to Fig. 1, the utility model solution constructs a kind of low-power consumption fast start circuit of LED drive power, including input
Rectification circuit 10, filter circuit 20, fast start circuit 30, auxiliary winding power supply circuit 40, pwm chip 50, wherein defeated
Enter the input terminal connection AC power source of rectification circuit 10, the output end of input rectification circuit 10 is connected quickly by filter circuit 20
The output end of start-up circuit 30, fast start circuit 30 connects pwm chip 50.The output end of auxiliary winding power supply circuit 40
Fast start circuit 30 is connected, the output end of auxiliary winding power supply circuit 40 connects pwm chip 50.
The fast start circuit working method are as follows: input rectification circuit 10 and filter circuit 20 are by the defeated of LED drive power
Enter AC signal and be rectified into direct current signal, the signal after input rectifying is transmitted to rapidly PWM control core by fast start circuit 30
The VCC power supply foot of piece 50, makes pwm chip 50 quickly open simultaneously output drive signal, drives the main switch plumber of LED power
Make, makes electric power starting.Then auxiliary winding power supply circuit 40 obtains energy and powers to the VCC of pwm chip 50, then fastly
Fast start-up circuit 30 shuts off the connection between the signal after input rectifying and the VCC foot of pwm chip 50, hereafter assists
Winding power circuitry 40 will power to pwm chip 50 always, repeat until LED drive power power-off, after being again started up
State process.
After above-mentioned working method will significantly reduce LED drive power work, loss of the start-up resistor to energy improves power supply
Efficiency simultaneously realizes quick start.
With reference to Fig. 2, the low-power consumption fast start circuit of the LED drive power of the utility model, input rectification circuit 10 is
Diode group rectification circuit.Diode group rectification circuit can refer to the prior art, not repeat herein.
Further, the low-power consumption fast start circuit of the LED drive power of the utility model, filter circuit 20 are capacitor
The output end of one end connection input rectification circuit 10 of C1, capacitor C1, the other end ground connection of capacitor C1.
Further, the low-power consumption fast start circuit of the LED drive power of the utility model, fast start circuit 30 wrap
Include reference voltage-stabilizing circuit, metal-oxide-semiconductor Q1, triode Q2, bleeder circuit and capacitor CE1, wherein the input of reference voltage-stabilizing circuit
End connection capacitor C1 and 10 tie point of input rectification circuit, the output end of reference voltage-stabilizing circuit are separately connected the grid of metal-oxide-semiconductor Q1
It is grounded with the ground terminal of the collector of triode Q2, reference voltage-stabilizing circuit.
The drain electrode connection capacitor C1 and 10 tie point of input rectification circuit of metal-oxide-semiconductor Q1, the source electrode of metal-oxide-semiconductor Q1 connect capacitor
One end of CE1, the other end ground connection of capacitor CE1；
The base stage of triode Q2 connects the tie point of capacitor CE1 and metal-oxide-semiconductor Q1 by bleeder circuit；
The tie point of the connection of pwm chip 50 capacitor CE1 and metal-oxide-semiconductor Q1.
Further, the low-power consumption fast start circuit of the LED drive power of the utility model, reference voltage-stabilizing circuit include
Resistance R1, resistance R2, resistance R3, resistance R4 and three-terminal voltage-stabilizing pipe U3；
The input terminal of three-terminal voltage-stabilizing pipe U3 passes through series resistance R1 and resistance R2 connection capacitor C1 and input rectification circuit 10
Tie point；
The output end of three-terminal voltage-stabilizing pipe U3 is separately connected the grid of metal-oxide-semiconductor Q1 and the current collection of triode Q2 by resistance R3
Pole；The output end of three-terminal voltage-stabilizing pipe U3 passes through the emitter of resistance R4 connecting triode Q2；
The ground terminal of three-terminal voltage-stabilizing pipe U3 is grounded.
Further, the low-power consumption fast start circuit of the LED drive power of the utility model, bleeder circuit include resistance
R7 and resistance R8；The base stage of triode Q2 passes through the tie point of resistance R7 connection capacitor CE1 and metal-oxide-semiconductor Q1, the base of triode Q2
Pole passes through the emitter of resistance R8 connecting triode Q2.
Further, the low-power consumption fast start circuit of the LED drive power of the utility model, fast start circuit 30 is also
Including resistance R5 and diode D1；The drain electrode of metal-oxide-semiconductor Q1 passes through resistance R5 connection capacitor C1 and 10 tie point of input rectification circuit；
The anode of the source electrode connection diode D1 of metal-oxide-semiconductor Q1, the cathode of diode D1 connect capacitor CE1.The base stage of triode Q2 passes through
The cathode tie point of resistance R7 connection capacitor CE1 and diode D1.
Further, the low-power consumption fast start circuit of the LED drive power of the utility model, fast start circuit 30 is also
Including resistance R6, the grid of metal-oxide-semiconductor Q1 passes through the source electrode of resistance R6 connection metal-oxide-semiconductor Q1.
Further, the low-power consumption fast start circuit of the LED drive power of the utility model, auxiliary winding power supply circuit
40 include transformer auxiliary winding, resistance R9 and diode D2；
Transformer auxiliary winding passes through the anode of resistance R9 connection diode D2, and the cathode of diode D2 connects capacitor CE1
With the tie point of metal-oxide-semiconductor Q1；
The cathode of diode D2 connects pwm chip 50.
Further, the low-power consumption fast start circuit of the LED drive power of the utility model, capacitor CE1 are electrolysis electricity
Hold, the source electrode of the anode connection metal-oxide-semiconductor Q1 of electrolytic capacitor, the cathode ground connection of electrolytic capacitor.
Specifically, the low-power consumption fast start circuit course of work of above-mentioned LED drive power are as follows:
After being powered to LED drive power, rectifier bridge, that is, BD1 of the power supply rectifies the AC signal of input, so
Capacitor C1 is filtered the signal after rectification to obtain busbar voltage VBUS, resistance R1, resistance R2, resistance R3, resistance R4, three afterwards
It holds the reference voltage-stabilizing circuit of voltage-stablizer U3 composition to provide reliablely and stablely driving signal to metal-oxide-semiconductor Q1, leads metal-oxide-semiconductor Q1 reliably
It is logical.Then busbar voltage VBUS charges to capacitor CE1 by resistance R5, metal-oxide-semiconductor Q1, diode D1.Because of resistance R5 resistance value
It is smaller, the quick charge to capacitor CE1 may be implemented.When the voltage on capacitor CE1 reaches the starting electricity of the i.e. U2 of pwm chip
When pressure, pwm chip U2 output drive signal drives main metal-oxide-semiconductor to work.Then auxiliary winding obtains energy and passes through resistance
VCC foot power supply after R9 current limliting, diode D2 rectification to pwm chip U2 charges to CE1；Resistance R7, resistance R8 simultaneously
Voltage on capacitor CE1 is divided, the signal after partial pressure is transmitted to the base stage of triode Q2, triode Q2 is connected, MOS
The grid of pipe Q1 just with reference is connect, and the grid of metal-oxide-semiconductor Q1 is low level, metal-oxide-semiconductor Q1 shutdown, cause busbar voltage VBUS with
The VCC power supply foot of pwm chip U2 disconnects.Hereafter, pwm chip U2 is only powered by auxiliary winding, thus
It avoids after LED drive power starting while by busbar voltage VBUS and auxiliary winding pwm chip U2 is powered
Situation reduces the loss of energy, promotes power-efficient.When being again started up after LED drive power power-off, above-mentioned mistake is repeated
Journey.
The utility model increases a fast start circuit in the control chip periphery of not high voltage startup, drives LED
Power supply of the busbar voltage to pwm chip after disconnecting power input rectification after power supply quick start, significantly reduces bus
Voltage improves power-efficient to the loss in pwm chip power supply line, to improve power supply reliability and extend LED
The service life of driving power.
Above embodiments are only to illustrate the technical ideas and features of the present invention, and its object is to allow be familiar with technique
Personage can understand the content of the utility model and implement accordingly, the protection scope of the utility model can not be limited.It is all with
The equivalent changes and modifications that the utility model claims range is done, should belong to the utility model claims covers model
It encloses.
Claims (10)
1. a kind of low-power consumption fast start circuit of LED drive power, which is characterized in that including input rectification circuit (10), filter
Wave circuit (20), fast start circuit (30), auxiliary winding power supply circuit (40), pwm chip (50), wherein
The input terminal of the input rectification circuit (10) connects AC power source, and the output end of the input rectification circuit (10) passes through
The filter circuit (20) connects the fast start circuit (30), described in the output end connection of the fast start circuit (30)
Pwm chip (50)；
The output end of the auxiliary winding power supply circuit (40) connects the fast start circuit (30), the auxiliary winding power supply
The output end of circuit (40) connects the pwm chip (50).
2. the low-power consumption fast start circuit of LED drive power according to claim 1, which is characterized in that the input
Rectification circuit (10) is diode group rectification circuit.
3. the low-power consumption fast start circuit of LED drive power according to claim 1, which is characterized in that the filtering
Circuit (20) is capacitor C1, and one end of the capacitor C1 connects the output end of the input rectification circuit (10), the capacitor C1
The other end ground connection.
4. the low-power consumption fast start circuit of LED drive power according to claim 3, which is characterized in that described quick
Start-up circuit (30) includes reference voltage-stabilizing circuit, metal-oxide-semiconductor Q1, triode Q2, bleeder circuit and capacitor CE1, wherein
The input terminal of the reference voltage-stabilizing circuit connects the capacitor C1 and the input rectification circuit (10) tie point, the base
The output end of quasi- voltage regulator circuit is separately connected the grid of the metal-oxide-semiconductor Q1 and the collector of the triode Q2, and the benchmark is steady
The ground terminal of volt circuit is grounded；
The drain electrode of the metal-oxide-semiconductor Q1 connects the capacitor C1 and the input rectification circuit (10) tie point, the metal-oxide-semiconductor Q1's
Source electrode connects one end of the capacitor CE1, the other end ground connection of the capacitor CE1；
The base stage of the triode Q2 connects the tie point of the capacitor CE1 Yu the metal-oxide-semiconductor Q1 by bleeder circuit；
The pwm chip (50) connects the tie point of the capacitor CE1 and the metal-oxide-semiconductor Q1.
5. the low-power consumption fast start circuit of LED drive power according to claim 4, which is characterized in that the benchmark
Voltage regulator circuit includes resistance R1, resistance R2, resistance R3, resistance R4 and three-terminal voltage-stabilizing pipe U3；
The input terminal of the three-terminal voltage-stabilizing pipe U3 by connect the resistance R1 and resistance R2 connection capacitor C1 with it is described defeated
Enter rectification circuit (10) tie point；
The output end of the three-terminal voltage-stabilizing pipe U3 by the resistance R3 be separately connected the metal-oxide-semiconductor Q1 grid and three pole
The collector of pipe Q2；The output end of the three-terminal voltage-stabilizing pipe U3 connects the emitter of the triode Q2 by the resistance R4；
The ground terminal of the three-terminal voltage-stabilizing pipe U3 is grounded.
6. the low-power consumption fast start circuit of LED drive power according to claim 5, which is characterized in that the partial pressure
Circuit includes resistance R7 and resistance R8；
The base stage of the triode Q2 connects the tie point of the capacitor CE1 Yu the metal-oxide-semiconductor Q1 by the resistance R7, described
The base stage of triode Q2 connects the emitter of the triode Q2 by the resistance R8.
7. the low-power consumption fast start circuit of LED drive power according to claim 6, which is characterized in that described quick
Start-up circuit (30) further includes resistance R5 and diode D1；
The drain electrode of the metal-oxide-semiconductor Q1 is connect by the resistance R5 connection capacitor C1 with the input rectification circuit (10)
Point；The source electrode of the metal-oxide-semiconductor Q1 connects the anode of the diode D1, and the cathode of the diode D1 connects the capacitor CE1.
8. the low-power consumption fast start circuit of LED drive power according to claim 7, which is characterized in that described quick
Start-up circuit (30) further includes resistance R6, and the grid of the metal-oxide-semiconductor Q1 connects the source of the metal-oxide-semiconductor Q1 by the resistance R6
Pole.
9. the low-power consumption fast start circuit of LED drive power according to claim 4, which is characterized in that the auxiliary
Winding power circuitry (40) includes transformer auxiliary winding, resistance R9 and diode D2；
The transformer auxiliary winding connects the anode of the diode D2, the cathode connection of the diode D2 by resistance R9
The tie point of the capacitor CE1 and the metal-oxide-semiconductor Q1；
The cathode of the diode D2 connects the pwm chip (50).
10. the low-power consumption fast start circuit of LED drive power according to claim 4, which is characterized in that the capacitor
CE1 is electrolytic capacitor, and the anode of the electrolytic capacitor connects the source electrode of the metal-oxide-semiconductor Q1, the cathode ground connection of the electrolytic capacitor.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821799186.1U CN209419941U (en) | 2018-11-01 | 2018-11-01 | A kind of low-power consumption fast start circuit of LED drive power |
| PCT/CN2019/080862 WO2020087864A1 (en) | 2018-11-01 | 2019-04-01 | Low-power consumption fast startup circuit for led driving power source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821799186.1U CN209419941U (en) | 2018-11-01 | 2018-11-01 | A kind of low-power consumption fast start circuit of LED drive power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209419941U true CN209419941U (en) | 2019-09-20 |
Family
ID=67933109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821799186.1U Expired - Fee Related CN209419941U (en) | 2018-11-01 | 2018-11-01 | A kind of low-power consumption fast start circuit of LED drive power |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN209419941U (en) |
| WO (1) | WO2020087864A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110753422A (en) * | 2019-10-19 | 2020-02-04 | 浙江凯耀照明有限责任公司 | Quick start circuit applied to operational amplifier building |
| CN114678830A (en) * | 2022-04-20 | 2022-06-28 | 天长市富安电子有限公司 | Low-power-consumption dimming circuit and power supply method thereof |
| CN116526428A (en) * | 2023-07-04 | 2023-08-01 | 广东东菱电源科技有限公司 | BUCK fast switch-on and switch-off protection circuit |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113410986B (en) * | 2021-04-26 | 2024-07-16 | 上海智租物联科技有限公司 | Low-power consumption power supply control method in circuit system |
| CN114243642B (en) * | 2021-12-31 | 2024-06-28 | 东莞欧陆通电子有限公司 | Under-voltage protection circuit and switching power supply thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2494852A1 (en) * | 2009-10-30 | 2012-09-05 | Koninklijke Philips Electronics N.V. | Selectively activated rapid start/bleeder circuit for solid state lighting system |
| CN206559681U (en) * | 2017-01-19 | 2017-10-13 | 深圳市瑞旺光电科技有限公司 | It is quick to start idle LED power supply circuit |
-
2018
- 2018-11-01 CN CN201821799186.1U patent/CN209419941U/en not_active Expired - Fee Related
-
2019
- 2019-04-01 WO PCT/CN2019/080862 patent/WO2020087864A1/en active Application Filing
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110753422A (en) * | 2019-10-19 | 2020-02-04 | 浙江凯耀照明有限责任公司 | Quick start circuit applied to operational amplifier building |
| CN110753422B (en) * | 2019-10-19 | 2021-12-03 | 浙江凯耀照明有限责任公司 | Quick start circuit applied to operational amplifier building |
| CN114678830A (en) * | 2022-04-20 | 2022-06-28 | 天长市富安电子有限公司 | Low-power-consumption dimming circuit and power supply method thereof |
| CN116526428A (en) * | 2023-07-04 | 2023-08-01 | 广东东菱电源科技有限公司 | BUCK fast switch-on and switch-off protection circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020087864A1 (en) | 2020-05-07 |
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Granted publication date: 20190920 |